The most powerful GPU that will go into the M4800 would be the M2200.  If you do any upgrades past what is in there right now, you will need to mod the drivers and disable "driver signature enforcement"

But will the m2000m work in it?

Hello

Please could you describe the process in more details

And which is the most powerful GPU which can be installed into M4800

Thank you

My Precision M4800 was running Windows 10 with Nvidia M2000M, drivers 397.93 as described by my first post:

https://www.dell.com/community/Precision-Mobile-Workstations/Quadro-M2000M-update-on-M4800/m-p/6182480/highlight/true#M749 

Unfortunately Windows Update decided that I needed a feature update and now I can't install any Nvidia drivers. I've tried disabling secure boot, bitlocker and driver security enforcement / nointegritychecks On (make sure you do it in that order or risk bitlocker recovery boot loop error 16000048 / 49 until manage-bde unlock/disable) and running both Dell and Nvidia packaged drivers. Ideally I need CUDA drivers to be able to run MXnet / VR / AI workloads but I'd settle for something that supports both monitors (like Ubuntu / Nouveau drivers) - assuming I can get my Xeon workstation with Gigabyte 1060 6Gb to run for more than 2 minutes before cutting out. 

It seems that Windows 10 Pro is ransomware. The BIOS no longer recognises the GPU and the M4800 has dropped out of the feature update testing. You can't downgrade Windows 10 and you can't install / update the drivers. I'd like a >4Gb GPU laptop but can't seem to source one in London. Could do more development in the cloud, AWS / Azure and use a dinky XPS like we had sustainable finance / energy trading but my broadband only supports 9Mb/s upload which is a QoS bottleneck on the dual gigabit teaming NIC and OM3 fibre I have in the house. I'd use 5G Wireless WAN with an external antenna but my wife is having treatment for Her2 +ve [censored] and distrusts the focussed beams / wireless power levels and I live in a conservation area under the Heathrow 27R flight path.

Maybe it's time to switch away from Dell - I still have a lingering loyalty from when Michael sold my Dad an 80286 PC/AT direct in 1988 after winning a school scholarship for the value.

Please post any solutions / suggestions / success stories!

Not to discourage you or anything but even if you are able to make it work, the performance of GTX 1050 may not be as you expected.

You can update the M4800 to M2200 using stock driver without disabling signature enforcement. Just browse to Windows 10 64bit inf provided by dell for Precision 7520.

Do you need to force install of the driver prior to physically installing the graphics card? I recently installed an M2000M in my Dell M4800, but only got a black screen upon start-up.  I could not see the dell icon, enter safe mode or bios, etc.  Definitely cannot progress far enough into Windows to install the modified driver.  The graphics card was a Dell according to the seller, but I have no way to confirm.  No issues with the PC after reinstalling the K2100M.  Running Windows 7 with latest nvidia drivers.

Update: Black screen was due to switchable graphics being disabled.  Enabled switchable graphics and reinstalled M2000M; however, Windows does not recognize the model of card. Device Manager shows additional Standard VGA Graphics Adapter in its place with Code 10 Error.  Modified driver will not install with 'Have Disk' method.  Throws 'incompatible with Windows version' error despite most definitely being the correct driver for Windows 7-64.

On the remote chance anyone but me sees this post, please advise. Thanks!

Hello, just wanted to chime in to report that Quadro T2000 works in M4800 (T1000 as well)

T2000 runs quite hot so the fans get quite loud. Therefore I would recommend the T1000 instead. Both cards will totally smoke the M2000M.

Both are tough to find, but the HP Z Mini MXM cards will fit into the M4800 with a little bit of work. Expect them to start popping up more on Ebay in the recent future.

https://notebooktalk.net/topic/361-precision-m4800-hp-quadro-t2000-upgrade/